Brahma stands for the absolute, formless divinity,the embodyment of truth,knowledge and bliss,and not for the vedas,Brahma(the creater),Prakreti(primordial matter), or any other substance.Supreme means the subtlest and the best.'Supreme indestructible'in this verse refers to the supreme reality or the oversoul.This supreme reality or oversoul is in reality the same as God.Svabhava means ones own being.It is the conscious,higher nature of God in the form of individual soul.When this higher nature of God permeats the lower material nature in the shape of body,senses mind and intellect.They all go by the name of self,and presides over them and it is termed as Adhyatma.Therefore,adhyatma means the totality of conscious spirits of individual souls.The totality of jivas or adhyatma is also the same as God.The word bhuta stands for all living beings,both sentiment and insentiment.The word visarga means the primeval resolve of God which brings forth the existence of all beings and advances their cause. And it is this great feat of God in the shape of this visarga which quickens inert matter with life and activates it,with the result that there is an unceasing flow of endless karmas in the universe till the very end of creation through fi nal dissolution.Therefore,it is this visarga which goes by the name of karma or action.
Ksarabhava is present before us in the form of the body,senses,mind,intellect, ego,the elements and various objects of senses.They are all sustained by the conscious higher nature of God,which is the same as the soul or spirit.It is collectively known as Adhibhuta.The word Purusa stands for the first person or brahma,who is known by the names of Sutratma,Hiranyagarbha and prajapathi as well.He represents the vital energy or life of all creation,sentiment and insentiment.
He is termed as 'Adhidaiva' the presiding diety.It is God himself who takes the form of Adhidaiva .Arjuna's query with reference to adhiyajna was two fold.
Who is adhiyajna and how does he dwells in the body? Lord says that He is himself 'Adhiyajna' and He dwells 'in this body'.It is the all pervasive aspect of God in the form of inner witness which dwells in the body.In addressing Arjuna as the best of all embodied beings, Lords intention is to show that Arjuna was a devotee of the Lord and was thus capable of grasping his meaning from a mere hint.